Which Shelly devices is the bypass compatible with?

It is compatible with the Shelly 1L Gen3 and Shelly 2L Gen3 relays and is used only together with them, in no-neutral installations.

When do I need this bypass?

When you install a Shelly 1L/2L Gen3 with no neutral wire and use low-power LED lamps that flicker or glow faintly when off. For incandescent bulbs it is not required.

Does the bypass work on its own as a smart device?

No. It is a fully passive accessory with no radio protocol and no Wi-Fi. It does not connect to an app and does not work without a Shelly 1L or 2L Gen3 relay.

Where is it mounted and what connections does it have?

It is mounted in parallel with the light source, usually behind the fixture or in the junction box, and connects to the relay output wire and to neutral.

What are its dimensions and power draw?

It measures 39x23x13 mm, weighs 8 g and consumes under 4 W at 240 V~, 50 Hz, according to Shelly data.

Can I install the bypass myself?

The work is done at 240 V inside the wall box, so we recommend installation by a qualified electrician. CasaSmart can advise on choosing the relay-plus-bypass combination.

Shelly Bypass for 1L/2L Gen3 no-neutral

Name: Shelly Bypass for 1L/2L Gen3 - no-neutral wiring accessory
Brand: Shelly
SKU: SHELLY-BYPASS-1L-2L-GEN3

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Shelly Bypass pentru 1L/2L Gen3 - accesoriu pentru montaj fara nul - main

What it is, who it's for, what it does

About this product

The Shelly Bypass for 1L/2L Gen3 is a passive wiring accessory designed to be installed together with the Shelly 1L Gen3 and Shelly 2L Gen3 relays in setups without a neutral wire.<br><br>These no-neutral relays draw a small current through the load to power themselves. With low-power LED lamps this residual current can cause flickering or a faint glow when the light is off. The bypass provides an alternative path for that current, removing the issue and letting you control lamps rated above 5 W.<br><br>It mounts directly behind the light source, inside the wall box, connecting to the relay output wire and to neutral. The compact 39x23x13 mm body fits even in tight cavities. It is not a smart device: it has no radio protocol and works passively alongside the Shelly relay. For incandescent bulbs the bypass is not required.

Delivery
Free from 1500 MDL
Returns
30 days to return
Warranty
24 months

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Where it works

Use cases

In a Chisinau apartment with a no-neutral switch, a bypass behind the fixture keeps the LED lamps fully off.

LED lamps flicker when the Shelly 1L Gen3 switch is off because of residual current.

In a kitchen in a Moldova home, the bypass stabilises control of LED spots wired to Shelly 2L Gen3.

With Shelly 2L Gen3 on two low-power LED lines, the residual current needs a path.

Analytics

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For the installer

Technical specifications

full spec · wiring · datasheet

Connectivity

Compatibilitate: Shelly 1L Gen3, Shelly 2L Gen3

Power

Tensiune nominala: 240 V~, 50 Hz
Consum: < 4 W
Sarcina minima becuri: > 5 W

Physical

Dimensiuni: 39x23x13 mm
Greutate: 8 g
Lungime cabluri: 65±5 mm

Environment

Temperatura de lucru: -20...70 °C
Umiditate: 30...70 % RH
Altitudine maxima: 2000 m

Full device datasheet

Support

Frequently asked questions

Which Shelly devices is the bypass compatible with?
It is compatible with the Shelly 1L Gen3 and Shelly 2L Gen3 relays and is used only together with them, in no-neutral installations.
When do I need this bypass?
When you install a Shelly 1L/2L Gen3 with no neutral wire and use low-power LED lamps that flicker or glow faintly when off. For incandescent bulbs it is not required.
Does the bypass work on its own as a smart device?
No. It is a fully passive accessory with no radio protocol and no Wi-Fi. It does not connect to an app and does not work without a Shelly 1L or 2L Gen3 relay.
Where is it mounted and what connections does it have?
It is mounted in parallel with the light source, usually behind the fixture or in the junction box, and connects to the relay output wire and to neutral.
What are its dimensions and power draw?
It measures 39x23x13 mm, weighs 8 g and consumes under 4 W at 240 V~, 50 Hz, according to Shelly data.
Can I install the bypass myself?
The work is done at 240 V inside the wall box, so we recommend installation by a qualified electrician. CasaSmart can advise on choosing the relay-plus-bypass combination.

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Questions about this product?

A CasaSmart manager calls you within 1–2 working hours and answers anything — compatibility, install, alternatives.

+373 60 944 922

Updated: 18 June 2026· reviewed by CasaSmart Expert Team